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Finding the Fourth Proportional to 34.09, 50.88 and 31.81

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Solution

The fourth proportional to 34.09, 50.88 and 31.81 is: 47.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    34.09 : 50.88 = 31.81 : x
  2. Step 2: Convert to fraction form
    34.09/50.88 = 31.81/x
  3. Step 3: Cross multiply
    34.09x = 50.88 × 31.81
  4. Step 4: Simplify right side
    34.09x = 1,618.37
  5. Step 5: Solve for x
    x = 1,618.37/34.09
  6. Step 6: Final answer
    x = 47.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.